Initialize StatisticsRecorder (singleton) before FieldTrails are

content/renderer/renderer_main.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/debug/trace_event.h"
 #include "base/hi_res_timer_manager.h"
 #include "base/i18n/rtl.h"
 #include "base/memory/ref_counted.h"
 #include "base/metrics/field_trial.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
+#include "base/metrics/statistics_recorder.h"
 #include "base/metrics/stats_counters.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
 #include "base/string_util.h"
 #include "base/system_monitor/system_monitor.h"
 #include "base/threading/platform_thread.h"
 #include "base/time.h"
 #include "content/common/pepper_plugin_registry.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
@@ skipping 142 matching lines @@
   base::PlatformThread::SetName("CrRendererMain");
 
   base::SystemMonitor system_monitor;
   HighResolutionTimerManager hi_res_timer_manager;
 
   platform.PlatformInitialize();
 
   bool no_sandbox = parsed_command_line.HasSwitch(switches::kNoSandbox);
   platform.InitSandboxTests(no_sandbox);
 
+  // Initialize histogram statistics gathering system.
+  base::StatisticsRecorder::Initialize();
+
   // Initialize statistical testing infrastructure.  We set client_id to the
   // empty string to disallow the renderer process from creating its own
   // one-time randomized trials; they should be created in the browser process.
   base::FieldTrialList field_trial(EmptyString());
   // Ensure any field trials in browser are reflected into renderer.
   if (parsed_command_line.HasSwitch(switches::kForceFieldTrials)) {
     std::string persistent = parsed_command_line.GetSwitchValueASCII(
         switches::kForceFieldTrials);
     bool ret = base::FieldTrialList::CreateTrialsFromString(persistent);
     DCHECK(ret);
@@ skipping 31 matching lines @@
 #endif
       TRACE_EVENT_BEGIN_ETW("RendererMain.START_MSG_LOOP", 0, 0);
       MessageLoop::current()->Run();
       TRACE_EVENT_END_ETW("RendererMain.START_MSG_LOOP", 0, 0);
     }
   }
   platform.PlatformUninitialize();
   TRACE_EVENT_END_ETW("RendererMain", 0, "");
   return 0;
 }